diff --git a/.github/workflows/install.yml b/.github/workflows/install.yml
index 922d894c5..6075757d1 100644
--- a/.github/workflows/install.yml
+++ b/.github/workflows/install.yml
@@ -36,10 +36,6 @@ jobs:
       matrix:
         include:
           # Ubuntu Installations
-          - name: ubuntu-20.04
-            image: ubuntu:20.04
-            imageFamily: debian
-            regressionFail: true
           - name: ubuntu-22.04
             image: ubuntu:22.04
             imageFamily: debian
diff --git a/README.md b/README.md
index b700df728..b9d3cdf3e 100644
--- a/README.md
+++ b/README.md
@@ -83,12 +83,12 @@ Then fork and clone the repo, source setup, make the tests and run regression
 > This section describes the open source toolchain installation.
 
 ### Compatibility
-The current version of the toolchain has been tested on Ubuntu (versions 20.04 LTS, 22.04 LTS, and 24.04 LTS), Debian (versions 11 and 12), Red Hat/Rocky/AlmaLinux (versions 8 and 9),
+The current version of the toolchain has been tested on Ubuntu (versions 22.04 LTS and 24.04 LTS), Debian (versions 11 and 12), Red Hat/Rocky/AlmaLinux (versions 8 and 9),
 and SUSE version 15.6. Only the latest minor release of each major version is tested.
 
 > [!WARNING]
-> - Ubuntu 22.04LTS is incompatible with Synopsys Design Compiler.
-> - Verilator currently fails to simulate correctly on Ubuntu 20.04 LTS and Red Hat/Rocky/AlmaLinux 8.
+> - Ubuntu is incompatible with Synopsys Design Compiler.
+> - Verilator currently fails to simulate correctly on Red Hat/Rocky/AlmaLinux 8.
 
 ### Overview
 The toolchain installation script installs the following tools:
diff --git a/bin/wally-distro-check.sh b/bin/wally-distro-check.sh
index 2f24c3daf..c6440d256 100755
--- a/bin/wally-distro-check.sh
+++ b/bin/wally-distro-check.sh
@@ -4,7 +4,7 @@
 ##
 ## Written: Jordan Carlin, jcarlin@hmc.edu
 ## Created: 30 June 2024
-## Modified:
+## Modified: 3 February 2025 - Deprecate Ubuntu 20.04
 ##
 ## Purpose: Check for compatible Linux distibution and set variables accordingly
 ##
@@ -98,8 +98,12 @@ elif [[ "$ID" == ubuntu || "$ID_LIKE" == *ubuntu* ]]; then
     else
         export UBUNTU_VERSION="${VERSION_ID:0:2}"
     fi
-    if (( UBUNTU_VERSION < 20 )); then
-        printf "${FAIL_COLOR}%s\n${ENDC}" "The Wally installation script has only been tested with Ubuntu versions 20.04 LTS, 22.04 LTS, and 24.04 LTS. You have version $VERSION."
+    if (( UBUNTU_VERSION < 22 )); then
+        printf "${FAIL_COLOR}%s\n${ENDC}" "The Wally installation script is only compatible with Ubuntu versions 22.04 LTS and 24.04 LTS. You have version $VERSION."
+        if (( UBUNTU_VERSION == 20 )); then
+            printf "${WARNING_COLOR}%s%s\n${ENDC}" "Support for Ubuntu 20.04 was removed after commit b38900c07baab2576d3f62cf1d2e4a729e8a37e5. " \
+                "You may try insalling using that version, but there will likely be issues (known issues include an incompatible version of git)."
+        fi
         exit 1
     fi
 elif [[ "$ID" == debian || "$ID_LIKE" == *debian* ]]; then
@@ -110,7 +114,7 @@ elif [[ "$ID" == debian || "$ID_LIKE" == *debian* ]]; then
     fi
     export DEBIAN_VERSION="$VERSION_ID"
     if (( DEBIAN_VERSION < 11 )); then
-        printf "${FAIL_COLOR}%s\n${ENDC}" "The Wally installation script has only been tested with Debian versions 11 and 12. You have version $VERSION."
+        printf "${FAIL_COLOR}%s\n${ENDC}" "The Wally installation script is only compatible with Debian versions 11 and 12. You have version $VERSION."
         exit 1
     fi
 elif [[ "$ID" == opensuse-leap || "$ID" == sles || "$ID_LIKE" == *suse* ]]; then
diff --git a/bin/wally-package-install.sh b/bin/wally-package-install.sh
index d7ca0a718..9702a9d10 100755
--- a/bin/wally-package-install.sh
+++ b/bin/wally-package-install.sh
@@ -4,7 +4,7 @@
 ##
 ## Written: Jordan Carlin, jcarlin@hmc.edu
 ## Created: 30 June 2024
-## Modified:
+## Modified: 3 February 2025 - Deprecate Ubuntu 20.04
 ##
 ## Purpose: Package manager installation for open source tool chain installation script
 ##
@@ -74,16 +74,13 @@ case "$FAMILY" in
             PYTHON_VERSION=python3.12
         elif (( UBUNTU_VERSION >= 22 )); then
             PYTHON_VERSION=python3.11
-        elif (( UBUNTU_VERSION >= 20 )); then
-            PYTHON_VERSION=python3.9
-            OTHER_PACKAGES+=(gcc-10 g++-10 cpp-10) # Newer version of gcc needed for Verilator
         elif (( DEBIAN_VERSION >= 12 )); then
             PYTHON_VERSION=python3.11
         elif (( DEBIAN_VERSION >= 11 )); then
             PYTHON_VERSION=python3.9
         fi
         # Mold not available in older distros for Verilator, will download binary instead
-        if (( UBUNTU_VERSION != 20 && DEBIAN_VERSION != 11 )); then
+        if (( DEBIAN_VERSION != 11 )); then
             VERILATOR_PACKAGES+=(mold)
         fi
         PACKAGE_MANAGER="DEBIAN_FRONTEND=noninteractive apt-get -y"
diff --git a/bin/wally-tool-chain-install.sh b/bin/wally-tool-chain-install.sh
index 9ffddf8bc..c932d8c96 100755
--- a/bin/wally-tool-chain-install.sh
+++ b/bin/wally-tool-chain-install.sh
@@ -8,13 +8,14 @@
 ## Modified: 23 March 2023
 ## Modified: 30 June 2024, Jordan Carlin jcarlin@hmc.edu
 ## Modified: 1 September 2024
+## Modified: 3 February 2025 - Deprecate Ubuntu 20.04
 ##
 ## Purpose: Open source tool chain installation script
 ##
 ## A component of the CORE-V-WALLY configurable RISC-V project.
 ## https://github.com/openhwgroup/cvw
 ##
-## Copyright (C) 2021-24 Harvey Mudd College & Oklahoma State University
+## Copyright (C) 2021-25 Harvey Mudd College & Oklahoma State University
 ##
 ## SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 ##
@@ -199,12 +200,6 @@ elif [ "$FAMILY" == suse ]; then
         ln -vsf /usr/bin/$f-13 "$RISCV"/gcc-13/bin/$f
     done
     export PATH="$RISCV"/gcc-13/bin:$PATH
-elif (( UBUNTU_VERSION == 20 )); then
-    mkdir -p "$RISCV"/gcc-10/bin
-    for f in gcc cpp g++ gcc-ar gcc-nm gcc-ranlib gcov gcov-dump gcov-tool lto-dump; do
-        ln -vsf /usr/bin/$f-10 "$RISCV"/gcc-10/bin/$f
-    done
-    export PATH="$RISCV"/gcc-10/bin:$PATH
 fi
 
 
@@ -231,7 +226,7 @@ source "$RISCV"/riscv-python/bin/activate # reload python virtual environment
 echo -e "${SUCCESS_COLOR}Python environment successfully configured!${ENDC}"
 
 # Extra dependecies needed for older distros that don't have new enough versions available from package manager
-if (( RHEL_VERSION == 8 )) || (( UBUNTU_VERSION == 20 )); then
+if (( RHEL_VERSION == 8 )); then
     # Newer versin of glib required for QEMU.
     # Anything newer than this won't build on red hat 8
     STATUS="glib"
@@ -272,7 +267,7 @@ if (( RHEL_VERSION == 8 )); then
 fi
 
 # Mold needed for Verilator
-if (( UBUNTU_VERSION == 20  || DEBIAN_VERSION == 11 )) || [ "$FAMILY" == suse ]; then
+if (( DEBIAN_VERSION == 11 )) || [ "$FAMILY" == suse ]; then
     STATUS="mold"
     if [ ! -e "$RISCV"/bin/mold ]; then
         section_header "Installing mold"
@@ -287,7 +282,7 @@ if (( UBUNTU_VERSION == 20  || DEBIAN_VERSION == 11 )) || [ "$FAMILY" == suse ];
 fi
 
 # Newer version of CMake needed to build sail-riscv model (at least 3.20)
-if (( UBUNTU_VERSION == 20  || DEBIAN_VERSION == 11 )); then
+if (( DEBIAN_VERSION == 11 )); then
     STATUS="cmake"
     if [ ! -e "$RISCV"/bin/cmake ]; then
         section_header "Installing cmake"